Specifications

Testing
Rev 6 Mar.13 Proprietary and Confidential - Contents subject to change 75
· With one other USB device already connected and assigned to
ttyUSB1:

(Note: The AT port is the fourth new device — / dev / ttyUSB4.)
6. Make sure your modem is connected and running, and then establish contact
with the module:
· Windows systems: Use a terminal emulation / communications program
such as Microsoft HyperTerminal
®
to connect over the COM port reserved
for AT commands (see listings in
Step 5):
a. Start HyperTerminal.
b. Select File > Connection Description. The Connection Description dialog
box appears.
i. Typ e Sierra in the Name box and click OK. The Connect To dialog box
appears.
ii. Click
OK without changing any of the displayed information. The
Connect dialog box appears.
iii. Click
Cancel.
Note: If necessary, use
AT E1 to enable echo.
iv. Ty p e ATZ in the HyperTerminal window. If the connection is
established, the message OK appears.
· Linux systems: Use a terminal emulation / communications program such
as minicom to connect over the device handle for AT commands (see
listings in
Step 5):
Note: If the command
“minicom” is not found,
then use a different
program, or download
minicom and repeat this
step. See
Downloading
and configuring minicom
for Linux systems on
page 76 for details.
i. Start minicom:
· First use of the modem: From the command line, type
minicom
-s. (The ‘-s’ switch shows the configuration menu.)
· Subsequent uses: From the command line, type minicom. (The
‘-s’ switch is assumed.)
The minicom configuration details appear and the message OK
appears when the connection is established.